题干

下列说法正确的是(   )

A:石油的催化重整和煤的干馏均可以得到芳香烃,说明石油和煤中含有芳香烃

B:石油裂解的目的主要是为了得到更多的汽油

C:石油分馏得到的产物可用来萃取溴水中的溴

D:石油裂化主要得到的是乙烯、丙烯等

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答案(点此获取答案解析)

C

同类题2

完形填空。阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    Virak Mao moved from Cambodia six and a half years ago. He was an exciting and 1 12-year-old boy,looking forward to his new life in Canada but fearful he wouldn't make friends, 2 since he didn't speak English. What great progress he has 3 since then.

    First of all, he got over those early difficulties and 4 friends. Mao not only mastered 5 but won the Grade 9 French award. At school, he 6 to organize school events. Mao also 7 at school, such as cleaning the library and helping others . Mao had wanted to be an engineer 8 after struggling with chemistry, he discovered a new passion for 9. At his Buddhist temple, Mao is a leader and 10 those who came to Canada for the first time to work hard. He also 11 in cultural dancing with other temple members, donating any 12 they raise back to the temple to buy supplies for the poor. Since the summer of 2011, he has held a job at a clothing store to help 13 his family. In June, Mao 14 from C.W. Jefferys and is now in the business management program at Ryerson University.

    He is also the first winner of a new scholarship 15 by the Graduate Business Council with the purpose of helping a student, 16 wants to improve his community and in 17 of money. Awarded the scholarship in June, Mao spoke about the 18 of the award. “I was so excited. It was a huge relief for me,” he said, adding he would buy textbooks and school supplies with the award. “I am really 19 they raised this money to award me the scholarship. I just have no words. Anyone who works hard gets well 20.”